import { v4 as uuidv4 } from 'uuid';
export const getUUID=()=>{
    //先检查本地是否有uuid
    let uuid_token = localStorage.getItem('UUIDTOKEN')
    //如果没有
    if(!uuid_token){
     uuid_token = uuidv4();
    //本地存储一次
     localStorage.setItem('UUIDTOKEN',uuid_token)
    }
    return uuid_token;
}